Abstract
A novel analytical solution to the 1D, steady-state, multi-slab, multi-group diffusion equation is proposed as a mean to compute the energy-dependent galactic cosmic ray-induced neutron fluxes established in planetary media. More specifically, the proposed algorithm is implemented to allow fast and highly accurate determination of low-energy cosmic ray neutrons inside the Earth's surface and atmosphere. Two sets of experimental measurements have been considered to validate our model. In both cases, a good agreement between the calculated and observed neutron fluxes is achieved. Subsequently, neutron diffusion calculations have been performed for various Earth-based scenarios comprising (a) two-slab (air-soil) configuration and (b) three-slab (air-soil-ice) configuration to investigate the functional relationship between soil composition and neutron spatial distribution.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 340-344 |
| Number of pages | 5 |
| Journal | Radiation Effects and Defects in Solids |
| Volume | 164 |
| Issue number | 5-6 |
| DOIs | |
| State | Published - May 2009 |
Keywords
- Diffusion
- Earth
- Galactic cosmic rays
- Neutrons
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- General Materials Science
- Condensed Matter Physics